Oxygen sensitivity of nano-CeO2 coating TiO2 materials

The oxygen sensitivity of pure TiO2, nano-CeO2 coating micro-TiO2 and nano-CeO2 coating nano-TiO2 materials was investigated in the present work. The experiments showed that the oxygen sensitivity of the nano-CeO2 coating nano-TiO2 materials was much better than that of the pure TiO2 and CeO2 coating micro-TiO2 materials. Thermodynamic analyses and XPS experimental results indicated that CeO2 was easier to be reduced into non-stoichiometric compound than TiO2 under the same change of partial oxygen pressure. With large special surface area and capacity of storing and releasing oxygen while the atmosphere changes, nano-CeO2 is a very good catalyst for the oxygen sensitivity of TiO2.